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Chapter 16. Animation

Animation can explain whatever the mind of man can conceive. This facility makes it the most versatile and explicit means of communication yet devised for quick mass appreciation.

—Walt Disney

As Walt Disney noted, animation is largely about explanation. Rotating an object provides information about shape and form. Doing a simulated walk-through of a building gives a sense of how it would feel to be inside the building. Watching a character’s facial expressions provides insight into the emotions the character is feeling.

With the latest graphics hardware and the OpenGL Shading Language, we can do even more realistic rendering in real time on low-cost graphics hardware. I was somewhat surprised when I found out how easy ...

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